Horisontalstabilisering av höghus i trä: Utredning av de vinkelräta skivornas inverkan på bärförmågan vid horisontalstabilisering
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
The purpose of this work is to show that not only the boards parallel to the wind direction will have affects on the stabilization but also the ones perpendicular to the wind direction. The buildings that will be studied include two eight-storey buildings outside Stockholm. Both houses are alike and the bottom floor of the buildings is made of concrete and the remaining seven floors of wood. This is a building construction projects made by Lindbäcks Construction AB in Piteå.Through this work, the stabilization in the perpendicular direction explored more how it interacts with the parallel. It will be shown by calculations where the wind stabilization through diaphragm action is calculated as usual, parallel to the wind direction, and then also add the boards perpendicular to the wind direction. The calculations will be done on both the long and short sides of the building.Because no tests were done in the lab on the timber-frame with double gypsumboards it has been used an existing test but with only a single board. In the test had the same type of wall, but with two different lengths tested and only one layer of gypsum. One was 1200x2400 mm and the other 3600x2400 mm. Both types of the timber-frame had the dimensions 45x95 mm c/c 600 mm and a single gypsumboard on one side. Based on this test the same force and deformation were pursued in the simulations in robot to determine the elastic modulus of a wall unit. To take the second gypsum layer in account an assumption was made that the second layer would increase overall stiffness by 80 %.The material properties were then used in all the walls in the large model to determine the total deflection of the building.The calculations showed that the slices perpendicular to the wind direction brought a small portion of stabilization. In the simulation it was found that cases in which the discs perpendicularly wind direction was taken with decreased deformation.The simulation of the building was done in addition to the ultimate limit state even in the serviceability limit state to see how the building behaves in ordinary conditions.The calculations showed that with the help of the three cases where the perpendicular walls were, the capacity of torque increased. With the help of these walls were load more widespread and evenly distributed than it was before.The simulation of the building showed that the deformation of the wind load direction decreased by 3,4% when the load acted on the long side and 23,9 % against short side. It shows that it is important to include these walls in the calculations but depending on the location, they contribute less or more.
Place, publisher, year, edition, pages
2015. , 72 p.
Teknik, Skivverkan, stabilisering
IdentifiersURN: urn:nbn:se:ltu:diva-42331Local ID: 05af0400-b895-4ede-8cd7-20a082e72332OAI: oai:DiVA.org:ltu-42331DiVA: diva2:1015551
Subject / course
Student thesis, at least 30 credits
Civil Engineering, master's level
Validerat; 20150526 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved